Alumni Member
Jianhan Zhu (Alumni) 
Research Fellow
I have worked on the AKT, Dot.Kom, and ELeGI projects. Currently I am interested in expert search in organizational intranets. A novel two-stage language model is proposed for effective expert search, and achieved excellent results in TREC Enterprise Track Expert Search task.
I have led the development of the CORDER (Community Relation Discovery by Named Entities) system which measures associations between named entities in a text corpus by integrating their occurrences, distances in text, and frequencies in documents.
I authored the ESpotter tool, which provides effective named entity recognition for a domain by adapting its lexicon and patterns to the domain through a URL tree.
Keys: Information Retrieval, Expert Search, Enterprise Search, Natural Language Processing, Named Entity Recognition, Text Mining, Semantic Web, Web Link Structure Mining
Projects
Technologies
News
Publications
Fernandez, M., Tirado, A., Pavon-Perez, A., Duddin, K., Zhang, M., Bakina, K., Bandara, A., Capdevila, R., Lazard, L. and Jurasz, O. (2025) Co-creating an Ontology of Online Gender-Based Harms: An Interdisciplinary Perspective, ISWC 2025 - The 24th International Semantic Web Conference, Nara, Japan
Ghafourian, Y., Hanbury, A. and Knoth, P. (2025) Ranking To Learn: Human Experts, Search Engines, or LLMs for Learning Guidance, TPDL 2025: The 29th International Conference on Theory and Practice of Digital Libraries, Tampere, Finland
Cancellieri, M., El-Ebshihy, A., Fink, T., Fröbe, M., GaluÅ¡Äáková, P., Goeuriot, L., Iommi, D., Keller, J., Knoth, P., Mulhem, P., Piroi, F., Pride, D. and Schaer, P. (2025) Extended Abstract of LongEval at CLEF 2025: Longitudinal Evaluation of IR Systems on Web and Scientific Data, 16th International Conference of the CLEF Association (CLEF 2025), Madrid, Spain
Tsaneva, S., Dessì, D., Osborne, F. and Sabou, M. (2025) Knowledge graph validation by integrating LLMs and human-in-the-loop, Information Processing & Management, 62, Elsevier
Cancellieri, M., Docekal, M., Pride, D., Gruenpeter, M., Douard, D. and Knoth, P. (2025) Interoperable verification and dissemination of software assets in repositories using COAR Notify, The 20th International Conference on Open Repositories, Chicago, Illinois, USA
Tech Reports
The Open University at TREC 2006 Enterprise Track Expert Search Task
Techreport ID: kmi-07-02
Date: 2007
Author(s): Jianhan Zhu, Dawei Song, Stefan Rüger, Marc Eisenstadt, Enrico Motta
LRD: Latent Relation Discovery for Vector Space Expansion and Information Retrieval
Techreport ID: kmi-06-09
Date: 2006
Author(s): Alexandre Gonçalves, Jianhan Zhu, Dawei Song, Victoria Uren, Roberto Pacheco
Exploiting Semantic Association To Answer Vague Queries
Techreport ID: KMI-06-01
Date: 2006
Author(s): Jianhan Zhu, Marc Eisenstadt, Dawei Song, Chris Denham
